13 Then cometh Jesus from Galilee to Jordan unto John, to be baptized of him.
14 But John forbad him, saying, I have need to be baptized of thee, and comest thou to me?
15 And Jesus answering said unto him, Suffer it to be so now: for thus it becometh us to fulfil all righteousness. Then he suffered him.
16 And Jesus, when he was baptized, went up straightway out of the water: and, lo, the heavens were opened unto him, and he saw the Spirit of God descending like a dove, and lighting upon him:
17 And lo a voice from heaven, saying, This is my beloved Son, in whom I am well pleased.
"Brethren, shall we not go on in so great a cause? Go forward and not backward. Courage, brethren; and on, on to the victory! Let your hearts rejoice, and be exceedingly glad. Let the earth break forth into singing. Let the dead speak forth anthems of eternal praise to the King Immanuel, who hath ordained, before the world was, that which would enable us to redeem them out of their prison; for the prisoners shall go free.
Let the mountains shout for joy, and all ye valleys cry aloud; and all ye seas and dry lands tell the wonders of your Eternal King! And ye rivers, and brooks, and rills, flow down with gladness. Let the woods and all the trees of the field praise the Lord; and ye solid rocks weep for joy! And let the sun, moon, and the morning stars sing together, and let all the sons of God shout for joy! And let the eternal creations declare his name forever and ever! And again I say, how glorious is the voice we hear from heaven, proclaiming in our ears, glory, and salvation, and honor, and immortality, and eternal life; kingdoms, principalities, and powers!"
Doctrine & Covenants 128: 22-23
...let me assure you that these are principles in relation to the dead and the living that cannot be lightly passed over, as pertaining to our salvation. For their salvation is necessary and essential to our salvation, as Paul says concerning the fathers—that they without us cannot be made perfect—neither can we without our dead be made perfect."
Both to the genealogy of the priests by the house of their fathers, and the Levites from twenty years old and upward, in their charges by their courses; And to the genealogy of all their little ones, their wives, and their sons, and their daughters, through all the congregation: for in their set office they sanctified themselves in holiness: …And thus did Hezekiah throughout all Judah, and wrought that which was good and right and truth before the Lord his God. And in every work that he began in the service of the house of God, and in the law, and in the commandments, to seek his God, he did it with all his heart, and prospered."
2 Chronicles 31:17-18, 20-21
And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it. And I will give unto thee the keys of the kingdom of heaven: and whatsoever thou shalt bind on earth shall be bound in heaven: and whatsoever thou shalt loose on earth shall be loosed in heaven."